转：https://blog.csdn.net/unsterbliche/article/details/80578606

pandas .to_excel不覆盖已有sheet的方法

直接to_excel会被覆盖，借助ExcelWriter可以实现写多个sheet。

from openpyxl import load_workbook excelWriter = pd.ExcelWriter(os.path.join(output_dir, 'datapoint_statistic.xlsx'), engine= 'openpyxl') pd.DataFrame().to_excel(os.path.join( output_dir, 'datapoint_statistic.xlsx')) #excel必需已经存在，因此先建立一个空的sheet _excelAddSheet(DataFrame, excelWriter, sheet_name) def _excelAddSheet(self,dataframe,excelWriter,sheet_name): book = load_workbook(excelWriter.path) excelWriter.book = book dataframe.to_excel(excel_writer=excelWriter,sheet_name=sheet_name,index= None) excelWriter.close()